15445961 has 2 divisors, whose sum is σ = 15445962. Its totient is φ = 15445960.

The previous prime is 15445943. The next prime is 15445999. The reversal of 15445961 is 16954451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15015625 + 430336 = 3875^2 + 656^2 .

It is a cyclic number.

It is not a de Polignac number, because 15445961 - 2⁶ = 15445897 is a prime.

It is a super-2 number, since 2×15445961² = 477155422427042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15445921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7722980 + 7722981.

It is an arithmetic number, because the mean of its divisors is an integer number (7722981).

Almost surely, 2^15445961 is an apocalyptic number.

It is an amenable number.

15445961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15445961 is an equidigital number, since it uses as much as digits as its factorization.

15445961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 35.

The square root of 15445961 is about 3930.1349849592. The cubic root of 15445961 is about 249.0414547949.

The spelling of 15445961 in words is "fifteen million, four hundred forty-five thousand, nine hundred sixty-one".